Cells are small because they can absorb nutrients much more efficiently. Because they are smaller they can efficiently absorb enough food. ... When a cell doubles in size the volume increases much more then the surface area, which is why large cells cannot receive enough food efficiently for their volume.
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Answer:
Endothermic reactions absorb energy, so the sum of the energy required exceeds the amount that is released. In all types of chemical reactions, bonds are broken and reassembled to form new products.
Explanation:
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Chemical reactions make and break the chemical bonds between molecules, resulting in new materials as the products of the chemical reaction. ... Breaking chemical bonds absorb energy, while making new bonds releases energy, with the overall chemical reaction being endothermic or exothermic.
<span>A callus is important to a healing fracture because it encloses the fracture site, creating a temporary bridge between the bones. This is important to facilitate healing and repair for the bone. It allows the bones to slowly grow back together, and it is eventually replaced with bone tissue and reabsorbed into the body over time.</span>
Friction and earth quakes
